Projecting screen



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A TTURHE YS WITNESSES Patented Apr. 3, 1923.

.Tome w. rmx, In., or NEW Yonx, N. Y.

l rxoLmc'rmG SCREEN.

Application med December 3, 1921. serial No. 519,618.

Taallwlimnitmyconcern: Y

.Be it known that 1 JonN W. Pncx, Jr., a citizen of the United States,and a resident of the city of New York, borough of Manhattan, in thecounty of New York and State of New York, have invented a new and-Improved ProJectm Screen, of which the following is a full, clear, andexact description.

This invention relates to improvements in projecting screens,particularly to a screen for displaying motion ictures or the like. Theprincipal object o ythe invention is to provide a screen which will haveunusually line reflecting powers and at the same time, a screen whichwill serve as a cooling agent to cool motion picture houses in which thescreen is used.

A further object is to provide a screen of this character which can bevery cheaply produced. To be more specific, the principal object of theinvention is to provide a screen which includes a reflecting surface offrost or snow, said-fsurface to be formed by any suitable refrigeratingapparatus.

Another object is to provide a snow screen of this character, in whichvmeans is provided for catching the drip from the screen, for keeping therefrigerating surface free from dust and extraneous matter, and forinsuring a smooth surface at all times.

With these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawin Figure 1 is a view in front e evation of myimproved screen, parts being broken away for clearness;

Figure 2 is a view in section therethrough on the line 2 2 of Fi rel;and

Figure 3 is a top p an view thereof.

Referring in detail to the drawings, the reference numeral 1 is used todesignate a support, to which a rectangular tank 2 is secured in any aproved manner. The tank Q is relatively tiin and the forward face of thetank is substantially the same size as the screens ordinarily used inthe projcction of motion pictures. The rear walls and the sides and topand bottom of the tunk are insulated h v the use of insulating material`such as 3. The tank itself is prefern|l-\4 formed of sheet metal and theinsulatf any suitable source o ing material may be asbestos or any othersulbdstance which does not transmit heat or co The tank 2 is filled withbrine and a system of ammonia pipes 4 or any suitable refrigeratingapparat-us within the tank serves to maintain a low temperature therein.5 represents the supply pipe of an ammonia system and 6 the return pipethereof, the series of pipes 4 being located inside of the tank and thepipes 5 and 6 leading to supply. It will be apparent that when therefrigerating apparatus is utilized to produce a very cold tcmperaturewithin the tank, that the cold ex posed front surface of the tank willcollect a coating of white frost or snow such as 7. It is of coursehighly desirable that this surface 6 of the tank should be as smooth aspossible so that a smooth coating of frost will be formed on the outsidethereof.

The light reflecting powers of frost or snow are well known and it istherefore thought unnecessary to dwell upon the particularly eicientnature ofA the screen for reflecting purposes. It is worthy of note`however, that a screen formed of frost will add materially in cooling atheatre and will also prove a great advertising feature in the summertime to attract patrons to a house using the same.

It is unnecessary to maintain the refrigerating system in operationexcept when the screen is in use and after the refrigerating system hasceased to operate the frost on the screen will naturali melt. A drip pansuch as 8 is provided un er the screen for catching this drip and anysuitable outlet 9 is utilized for draining the water out of the drippan.

10 represents a scraper bar carrying at its ends sleeves 11 which areslidable vertically upon guide bars 12 at opposite sides of the screen.These guide bars may be mounted in suitable brackets 13 secured to thetank and serve to maintain the scraper bar 10 spaced a predetermineddistance from the frost surface 6 of the tank. A flexible device in theform of a cable 14 running over a pulley 15 mounted upon the top of thetank serves to lower and raise the scraper. This scraper not only Servesto maintain a smooth frosted surface. but also is useful for keepingdust und otllei` extraneous mutter olf of the screen.

l't is to bc understood that thc aecompanying drawings and the abovedescription are merely illustrative of one Way in which the invention iscarried out, but that the invention itself is broad enough to cover anyuse of frost or snow for display purposes. It will be evident.therefore, that although I have illustrated one of the preferredembodiments of my invention that various slight changes and alterationsvmight be made in the general form and arrangement of the partsdescribed without departing from the invention, and hence I do not wishto limit myself to the precise details set forth, but shall considermyself at liberty to make such slight changes and alterations as fairlyfall within the spirit and scope of the appended claims.

I claim:

1. As a new article of manufacture` a projecting screen for motionictures, including an artificially cooled s eet of material adapted tocollect frost.

2. As a new article of manufacture, a projectingscreen formotion'pictures, including an artificially` cooled sheet of metaladapted to collect frost.

3.. As a new article of manufacture, a projecting screen for motionpictures including an artificially cooled sheet of material adapted tocollect frost, and a panel-like refrigeration tank arranged in asubstantially vertical plane and having a plane front wall constitutingsaid sheet of material.

4. As a new article of manufacture, a rojecting screen for motionpictures inclu ing an artificially cooled sheet of material adapted tocollect frost, and a panellike refrigeration tank arranged in asubstantially vertical plane and having a plane front wall constitutingsaid sheet of material, said tank having associated therewith means forpreventing the formation of frost-on the exterior of the tank at pointsbeyond said wall.

5. As a new article of manufacture, a rojecting screen for motionpictures inclu ing an artificially cooled sheet of material adapted tocollect frost, and a panel-like refrigeration tank arranged in asubstantially vertical plane and having' a plane front wall constitutingsaid sheet of material, said tank also having a back wall, and top,bottoln and side walls of relatively small area compared to said frontand back wal-ls, there being provided means for insulating all wallsurfaces save said front wall.

6. As a new article of manufacture, a rojecting screen for motionpictures inclu ing an artificially cooled sheet of material adapted tocollect frost, a panel-like refrigeration tank arranged in asubstantially vertical plane aud having a plane front wall constitutingsaid sheet of material, there being also provided a scraper spaced fromsaid wall and movable in a plane arallel thereto for engaging thefrosted sur ace, and, means for operating the scraper.

7. As a new article of manufacture, a projectino screen for motionpictures including an artificially cooled sheet of material adapted tocollect frost, and a panel-like refrigeration tank arranged in asubstantially vertical plane and having a plane front wall constitutingrsaid sheet of material, there being also provided means for regulatingrthe thickness of such frost collection.

8. As a new article of manufacture, a )rojecting screen for motionpictures inclu ing an artificially cooled sheet of material adapted tocollect frost, and a panel-like refrigeration tank arranged in asubstantially vertical plane and having a planefront wall constitutingsaid sheet of material, there being also provided a drip pan extendingacross the entire width of said wall for collecting the drip from saidfrost.

JOHN W. PECK, J.

